That is a simple byproduct of equal & opposite forces. If the PSI is the same, a lower volume tire and a higher volume tire will have identical contact patch surface area. And for a given bike/rider effective mass, the contact patch surface area is determined *solely* by the PSI, and has nothing to do with carcass size. Contact patch surface area, of course, is critical. The total tire carcass toroidal surface area (which is what you seem to be referencing) is largely irrelevant. Today's Explainer covers the basics of tire pressure, and we'll talk about why you should care, what you should look for, and I'll try to convince you to finally buy (and use) a pressure gauge.Įpisode 1 - What's the Deal with Linkage Forks?Įpisode 4 - What's the Deal with Cross-Country Racing?Įpisode 5 - The Basics of Modern Mountain Bike GeometryĮpisode 6 - Why Are We Using 12-Speed Drivetrains?Įpisode 7 - Decoding Mountain Bike Tire Hot Patches Worst case? You end up on the ground, possibly even injured, and all because you didn't check your tire pressure. Maybe you'll need to buy a new tire or rim. And if that describes you, the best-case scenario is that you're not getting the most from your expensive bike. None of the latest and greatest gear will save your ass if you're way out to lunch when it comes to tire pressure. While tire pressure isn't anywhere near as interesting as the latest downhill bike, impossibly light carbon wheels, or some battery-powered drivetrain, the boring truth is that's far more important.
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